revert: remove tracked NomadWorks repo state (NeuralNomadsAI#472)

## Summary
- revert the NomadWorks initialization artifacts that introduced tracked
`.nomadworks` state, root `codemap.yml`, SCR registry files, and task
registry files
- keep the tracked `.opencode` project configuration/commands/agent
files because they are part of the expected CodeNomad repo setup
- preserve unrelated product commits while cleaning up only the
NomadWorks-generated repo state

Author: pascalandr